Model-based approach for analysis of contrast media regions in contrast enhanced breast model images

Abstract

Contrast agents in radiology improve visualisation and iodine-based ones are applied in differ- ent radiology techniques. Energies, used in these techniques, vary in a very wide range. The energies can be as low as 26 kVp in mammography and reach up to 140 - 150 kVp in computed tomography. Dual-energy studies can also be applied. X-ray images of resin phantoms with iodine-based contrast base are taken at different energies and the image pixel values of various regions of interest were measured. Based on the performed measurements, the visual contrast between the studied different areas is calculated and analysed. The obtained data are applied for the estimation of models for the expected pixel values depending on the energies and the contrast agent quantities. These models can be used to describe the real conditions, which differ from the applicable to theoretical calculations ideal conditions.